chore: prepare for release 3.4.3-easyjet

Client-specific pre-release for EasyJet to address iOS crash issues.

Changes:
- Update version to 3.4.3-easyjet (pre-release identifier)
- Add CHANGELOG entry documenting the fix
- Update all version files (pubspec.yaml, package_info.dart, README.md)

This release uses swift-sdk branch fix/upgrade-nwpathmonitor-ios17-requirement
which upgrades NWPathMonitor to iOS 17.0 with fail-safe initialization guards.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: muzahidul-opti

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Optimizely Flutter SDK Changelog
 
+## 3.4.3-easyjet
+April 20, 2026
+
+**Note:** This is a client-specific pre-release version for EasyJet.
+
+### Bug Fixes
+* Upgrade NWPathMonitor iOS requirement to iOS 17.0 to address rare crash on older iOS versions
+* Add fail-safe initialization guards in NetworkReachability to prevent null pointer crashes
+* Use custom swift-sdk branch with defensive NWPathMonitor handling
+
+**Dependencies:**
+* OptimizelySwiftSDK: git branch `fix/upgrade-nwpathmonitor-ios17-requirement`
+
 ## 3.4.2
 March 25, 2026
 

README.md

@@ -30,7 +30,7 @@ Other Flutter platforms are not currently supported by this SDK.
 To add the flutter-sdk to your project dependencies, include the following in your app's pubspec.yaml:
 
 ```
-   optimizely_flutter_sdk: ^3.4.2
+   optimizely_flutter_sdk: ^3.4.3-easyjet
 ```
 
 Then run 

lib/package_info.dart

@@ -3,5 +3,5 @@
 
 class PackageInfo {
   static const String name = 'optimizely_flutter_sdk';
-  static const String version = '3.4.2';
+  static const String version = '3.4.3-easyjet';
 }

pubspec.yaml

@@ -1,6 +1,6 @@
 name: optimizely_flutter_sdk
 description: This repository houses the Flutter SDK for use with Optimizely Feature Experimentation, Optimizely Full Stack (legacy), and Optimizely Rollouts.
-version: 3.4.2
+version: 3.4.3-easyjet
 homepage: https://github.com/optimizely/optimizely-flutter-sdk
 
 environment: